#include <Arduino.h>
#include <Wire.h>
#include "SSD1306Wire.h"

SSD1306Wire display(0x3c, SDA, SCL); // ADDRESS, SDA, SCL  -  SDA and SCL usually populate automatically based on your board's pins_arduino.h e.g. https://github.com/esp8266/Arduino/blob/master/variants/nodemcu/pins_arduino.h
#define DEMO_DURATION 3000
typedef void (*Demo)(void);

int demoMode = 0;
int counter = 1;

void setup()
{
  display.init();
  display.flipScreenVertically();
  display.setFont(ArialMT_Plain_10);
}

void drawFontFaceDemo()
{
  // Font Demo1
  // create more fonts at http://oleddisplay.squix.ch/
  display.setTextAlignment(TEXT_ALIGN_LEFT);
  display.setFont(ArialMT_Plain_10);
  display.drawString(0, 0, "Hello world");
  display.setFont(ArialMT_Plain_16);
  display.drawString(0, 10, "Hello world");
  display.setFont(ArialMT_Plain_24);
  display.drawString(0, 26, "Hello world");
}

void drawTextFlowDemo()
{
  display.setFont(ArialMT_Plain_10);
  display.setTextAlignment(TEXT_ALIGN_LEFT);
  display.drawStringMaxWidth(0, 0, 128,
                             "Lorem ipsum\n dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore.");
}

void drawTextAlignmentDemo()
{
  // Text alignment demo
  display.setFont(ArialMT_Plain_10);

  // The coordinates define the left starting point of the text
  display.setTextAlignment(TEXT_ALIGN_LEFT);
  display.drawString(0, 10, "Left aligned (0,10)");

  // The coordinates define the center of the text
  display.setTextAlignment(TEXT_ALIGN_CENTER);
  display.drawString(64, 22, "Center aligned (64,22)");

  // The coordinates define the right end of the text
  display.setTextAlignment(TEXT_ALIGN_RIGHT);
  display.drawString(128, 33, "Right aligned (128,33)");
}

void drawRectDemo()
{
  // Draw a pixel at given position
  for (int i = 0; i < 10; i++)
  {
    display.setPixel(i, i);
    display.setPixel(10 - i, i);
  }
  display.drawRect(12, 12, 20, 20);

  // Fill the rectangle
  display.fillRect(14, 14, 17, 17);

  // Draw a line horizontally
  display.drawHorizontalLine(0, 40, 20);

  // Draw a line horizontally
  display.drawVerticalLine(40, 0, 20);
}

void drawCircleDemo()
{
  for (int i = 1; i < 8; i++)
  {
    display.setColor(WHITE);
    display.drawCircle(32, 32, i * 3);
    if (i % 2 == 0)
    {
      display.setColor(BLACK);
    }
    display.fillCircle(96, 32, 32 - i * 3);
  }
}

void drawProgressBarDemo()
{
  int progress = (counter / 5) % 100;
  // draw the progress bar
  display.drawProgressBar(0, 32, 120, 10, progress);

  // draw the percentage as String
  display.setTextAlignment(TEXT_ALIGN_CENTER);
  display.drawString(64, 15, String(progress) + "%");
}

// void drawImageDemo()
// {
//   // see http://blog.squix.org/2015/05/esp8266-nodemcu-how-to-create-xbm.html
//   // on how to create xbm files
//   display.drawXbm(34, 14, WiFi_Logo_width, WiFi_Logo_height, WiFi_Logo_bits);
// }

Demo demos[] = {drawProgressBarDemo};
int demoLength = (sizeof(demos) / sizeof(Demo));
long timeSinceLastModeSwitch = 0;

void loop()
{
  // clear the display
  display.clear();
  // draw the current demo method
  demos[demoMode]();

  display.setFont(ArialMT_Plain_10);
  display.setTextAlignment(TEXT_ALIGN_RIGHT);
  display.drawString(128, 54, String(millis()/1000 ));
  // write the buffer to the display
  display.display();

  if (millis() - timeSinceLastModeSwitch > DEMO_DURATION)
  {
    demoMode = (demoMode + 1) % demoLength;
    timeSinceLastModeSwitch = millis();
  }
  counter++;
  delay(10);
}
